It's June, the heat has arrived, and I'm already sweating profusely after walking out for less than half an hour during the day. In this kind of weather, a fan becomes a necessity; what is a cooling fan?It's an electric fan that blows out cold air.You only need to add water and ice cubes to the fan to blow out cold air; the traditional vertical fan is more effective.

1. What is the relationship between the cooling fan and the controller?Why do we need air tightness testing?

The controller refers to a master device that changes the wiring of the main circuit or control circuit in a predetermined sequence and changes the resistance value in the circuit to control the starting, speed regulation, braking and reverse direction of the motor.Then the starting or pausing of the cooling fan needs to be realized by using the controller; when the cooling fan is used for a period of time and the internal components become rusty or short-circuited, the first thing that comes to mind is whether the air tightness test of the cooling fan controller is qualified?If the sealing of the cooling fan controller is not good and it works in the air-conditioning and water vapor, water vapor will enter the controller, directly damaging the controller and affecting the normal operation of the fan.In this article, Hirays Technology introduces the cooling fan controller to everyone.Air tightness testingmethod.

Picture: Cooling fan controller air tightness testing instrument + tooling

2. Detection principle of cooling fan and controller:

It adopts the detection principle of air pressure decreasing method, uses air as the medium to detect products, and can detect small leaks in a short time.Hirays Technology makes a sealed mold based on the shape of the cooling fan controller.Conventional controllers are highly precise. After the mold is closed up and down, the air tightness of the product can be judged by changes in the air pressure inside the mold.

Picture: Cooling fan controller waterproof tester tooling + test details

Hirays Technology has been committed to the research, development and production of air tightness detectors, and has conducted a large number of air tightness and waterproof level test experiments for cooling fan controllers, and has accumulated rich technical experience.Detect through the air pressure decrement method; detect whether there will be water leakage through the gas attenuation method and pressure drop method.

Figure: Cooling fan controller test details

The steps for waterproof detection of the cooling fan controller are as follows:

Whether it is IP66 waterproof testing, IP67 waterproof testing, or a higher level waterproof testing, the steps are similar, but the parameter settings are different;

1. Because the product to be tested does not have any inflation holes, Hirays Technology made a set of sealing molds based on the shape characteristics of the cooling fan controller;

2. Set parameters according to customer requirements, such as inflation time, inflation pressure, test time, test pressure and other parameters.

According to customer requirements, the tested waterproof level is IP67.The test pressure is 12KPA, the air intake time is 4s, the pressure stabilization time is 4s, the test time is 5s, and the upper limit of leakage is 0.05kpa.

4. Place the cooling fan controller in a sealed tooling, start the air tightness detector for testing, and find out the maximum leakage value allowed by the cooling fan controller (within the allowed range)

5. If there are no other problems, the air tightness test of the batch cooling fan controller can be carried out.

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